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Astronaut Douglas H. Wheelock, the man responsible for the first FourSquare check-in from space, has been brought social media technology into his explorations again by tweeting some of his observations from high above the planet, revealing some stunning images over the past few days. Here are just a few of the beautiful Earth images Wheelock captured during his journey in space. Above is the Isle Juan de Nova in the Mozambique Channel between Madagascar and the African mainland.